has_cs operator

  • Article

Filters a record set for data with a case-sensitive search string. has_cs searches for indexed terms, where an indexed term is three or more characters. If your term is fewer than three characters, the query scans the values in the column, which is slower than looking up the term in the term index.

The following table compares the has operators using the abbreviations provided:

  • RHS = right-hand side of the expression
  • LHS = left-hand side of the expression
Operator Description Case-Sensitive Example (yields true)
has Right-hand-side (RHS) is a whole term in left-hand-side (LHS) No "North America" has "america"
!has RHS isn't a full term in LHS No "North America" !has "amer"
has_cs RHS is a whole term in LHS Yes "North America" has_cs "America"
!has_cs RHS isn't a full term in LHS Yes "North America" !has_cs "amer"

For more information about other operators and to determine which operator is most appropriate for your query, see datatype string operators.

Performance tips

Note

Performance depends on the type of search and the structure of the data. For best practices, see Query best practices.

Syntax

T | where Column has_cs (Expression)

Learn more about syntax conventions.

Parameters

Name Type Required Description
T string ✔️ The tabular input whose records are to be filtered.
Column string ✔️ The column used to filter the records.
Expression scalar or tabular ✔️ An expression for which to search. If the value is a tabular expression and has multiple columns, the first column is used.

Returns

Rows in T for which the predicate is true.

Example

Run the query

StormEvents
| summarize event_count=count() by State
| where State has_cs "FLORIDA"

Output

State event_count
FLORIDA 1042

Since all State values are capitalized, searching for a lowercase string with the same value, such as "florida", won't yield any results.

Run the query

StormEvents
| summarize event_count=count() by State
| where State has_cs "florida"

Output

State event_count